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At such speeds, the projecticle explodes on impact and carves out a round bowl-shaped depression on the surface. How can you distinguish an impact crater from a volcanic crater?Volcano craters are above the surrounding area on mountaintops while the craters from impacts are below the surrounding area with raised rims.

Select the image to go to the Selene website for a great flyover of the crater. Terrestrial planets have hard surfaces that can be re-shaped by several different processes: impact cratering, volcanism, erosion, and tectonics. Links to external sites will be displayed in another window.Volcanism is any eruption of molten lava onto the surface.The molten rock has a lower density than solid rock so it rises.The craters on all of the moons except Io, Mercury, and most of the ones on Mars are from impacts.

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